Lifting jack adapter device



Feb. 20, 1945. H, EN 2,369,789

LIFTING JACK ADAPTER DEVICE Filed June 24, 1944 r '2 Sheets-Sheet 1 FJZT' 2 Inventor Feb. 20, 1945. c, H. MADDEN 2,369,739

' LIFTINGJ-ACK ADAPTER DEVICE Filed June 24, l944 2 Sheets-Sheet 2 F1 4 v I flag/mes firmer Mnoozw,

" and to satisfactorily retain the adapter in de-.

. shoved tightly between these parts so as to pro- Patented Feb. 20, 1945 UNITED STATES 2,369,789 LIFTING JACK ADAPTER DEVICE,

Clarence Henry Madden, Hollis, Okla.

Application June 24,

3 Claims. This invention relates to a novel and improved adapter device for use in connection with a conventional vehicle lifting jack, and has more specific reference to a type' which embodies an elongated horizontally disposable reach bar constructed at one end for attachment to the vehicle and: at its opposite end to rest upon the jack, whereby to provide a satisfactory and convenient means of transmitting, by remote control, the lifting forces of the jack to the vehicle being lifted.

. Admittedly, lifting jack adapters of this general type are well known in-theart to which the invention appertains. Therefore, .such novelty as'is herein presented is predicated upon the specific features of refinement and explicit details which contribute in the production of a specifically distinct and improved adapter.

Incarrying out the principlesof the invention,

I have found it. expedient and practicable to utilize a simple reach bar, this having, at its inner end, means to embrace the leaf spring and an adjustable chock forming a fulcrum, said parts being expressly designed for expedient coaction "pendable position for adequate use.

Other features and advantages will become per se. a

Figure 4 is an inner or front end elevation thereof, this disclosing the hook-like springengaging cleat.

Figure 5 is a side 'elevationalvview of a fragmentary type based on Figure 4. v

Figure 6 is a side elevational view of the reach bar.

Figure 7 is an end elevation of the bar observing Figure 8 in a direction from left to-right.

Figures 8 and 9 are detail views of the shiftable fulcrum forming chock.

Reference being had to the complete assem blage seen in Figure 3, it will be observed that th adapter comprises an elongated reach bar l preferably of rectangular cross-sectional form.

1944, Serial No. 541,897

As brought out better in Figure 6, this is provided with a front axle-engaging notch H at one end and with a keying lug 62 at the opposite end. The upper-edge portion is provided on opposite sides with channels or grooves forming duplicate keyways l3. These keyways serve to accommo-- date keying ribs formed in the basal-portion I 4 of the wedge or chock l5. This part I5 is of b1ock-like design and includes an inclined body 10 portion l6 which forms the wedge proper. The part I4 is slipped over the end of the bar. with the ribs in the keyways l3, this as brought out in Figure 3.

- The substantially c-shaped cleat II has a slot l5 l8 fitting over the keying lug l2 and clamped in place by a suitable fastener l9. In Figures 1 and 2, the rear axle of the vehicle is indicated at A and the leaf spring at B. The conventional lifting Jack is denoted at C.

The adapter device in use is shown in Figure 1.

'As here observed the accommodation or keeper notch in the cleat vll embraces the spring B. The

- chock or wedge I5 is interposed between the reach bar and the overlying leaves of the spring. It is .vide the desired clamping and fulcruming action. The rear end of the reach bar extends to a point sufliciently clear of the fenders and chassis to permit the lifting jack to be placed therebeneath as brought out in Figure 1. Consequently. the

reach bar serves as a cantilever and transmits the lifting forces of the Jack to the axle region of the spring B. Thus, by remote control the I jack elevates the spring, axle and wheels and, in

85 turn, the vehicle, in an obvious manner.

' As before explained. this device is primarily intended for use on the rear of the vehicle where it is exceedingly difficult to place a Jack beneath the axle region of the spring. However, the

40 structure is convertible in the sense that the notch II can be used for hooking the face flange on the front'axle (not shown) if and whendesired. Consequently, the adapter is of a convertible character. Y

It is thought that persons skilled in the art to which the invention relates will be able to obtain a clear understanding of the invention after considering the description in connection .with the drawings. Therefore, a more lengthy desc'rip tion is regarded as unnecessary.

Minor-changes in theshape, size and arrangement of details coming within the field of invention claimedmay be resorted to in actual practl tice,'if desired.

scribed comprising an elongated reach bar having longitudinal grooves in opposite sides forming keyways, a chock including a wedge and a body portion, said body portion having keying ribs,

assures means on one end of said bar closing said keyways and adapted to engage a leaf spring.

3. A lifting jack adapter device at the class described comprising anelon'gated reach barhavine said ribs being slidable in said keyways, and

longitudinal grooves in opposite sides iforming keyways, a chock including a wedge and a body portion, said body portion having keying ribs, said ribs being slid-able in said keyways, and means on one end of said bar closing said keyways and adapted to engage a leaf spring. said means oomprising a. detachable C-shaped cleat.

CLARENCE HENRY MADDEN. 

